Gas-burner.



No. 628,063. Patented July 4, I899. J. F. BARKER. GAS BURNER. (Application filed Dec. 12 1898.)

(No Modal.)

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UNITED STATES PATENT- OFFICE.

JOHN F. BARKER, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE GILBERT & BARKER MANUFACTURING COMPANY, OF SAME PLACE.

GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 628,063, dated July 4, 1899. Application fil ed December 12, 1898, Serial No. 698,954. (No model.)

To all whom, it may concern:

Be it known that I, JOHN F. BARKER, a citizen of the United States of America, residing at Springfield, in the county of I'Iampden and State of Massachusetts, have invented a certain new and useful Improvement in Gas- Burners, of which the following is a description, reference being bad to the accompanying drawings, wherein Figure l isa plan View of aburnerembodying said improvement. Fig. 2 is a view of a portion of the parts shown in Fig. l in central longitudinal horizontal section.

The improvement belongs to that class of gas-burners in which the gas is consumed in the shape of a pencil of flame for the purpose of utilizing its heat in various processes of manufacture-as, for instance, in the jewelers art. In gas-burners of this class the gas, whether it be carbureted hydrogen or a hydrocarbon, such as is commonly produced from gasolene, is generally mixed with atmospheric air, both being under pressure, before it reaches the point of combustion and the apparatus herein shown is designed for that use. In the accompanying drawings the letter a denotes a central gas-conducting pipe-that is, located centrally within another--which has a burner end a.

The letter b-denotes the outer annular pipe, which incloses the said central pipe (1. It is closed at the rear end and suitably shaped at the front or burner end. There is a small valve-orifice 0 leading from the interior of the inner pipe to the interior of the outer pipe, the passage of gas through which is adjustably controlled by the adjustable valve (1, the stem of which is preferably a screw.

The gas may enter at e and the air at f. They meet, mix in the chamber g, and the mixed air and gas travels into the central gas conducting pipe to the point of combustion at theburner end. If, with matters in this condition, the operator slightly opens the valve d, a portion ofthe gas flows through the valve-orifice, fills the outer pipe I), and, proceeding to the open end, is consumed along with the gas which escapes from the burner end of the pipe a, at the same time covering that volume of gas which is escaping from pipe a with an outer gaseous envelop of greatly-diminished velocity, with the result of making the volume under consumption in the shape of a pencil much steadier and more reliable in every way than would otherwise be the case, andthe opening of the valve alters the relative pressures of the mixed air and gas to great practical advantage.

I claim as my improvement- In a burner, the combination with the pipe (I, having burner end a at one extremity and mixing-chamber g at the other, and means for supplying air and gas to said chamber; of the annular pipe I) surrounding pipe 0. and having a burner end coincident therewith, an orifice 0 connecting said pipes remote from the burner, and a valve the purpose set forth.

Q JOHN I BARKER. Witnesses:

E. H. BREWSTER, H. O. BREWSTER.

therefor, as and for 

